Facts about Animals

Animal Facts

Facts about Animals


These facts about animals will help interest kids of any age about the world of animals.

Types of Animals


  • Animals are classified into 2 major categories which include vertebrates and invertebrates. The major difference between invertebrates and vertebrates is vertebrates have a backbone.

  • Currently there are more than 1,300,000 different known species of invertebrates. Scientists think that there are many more invertebrate species that are yet to be discovered.

  • Scientists estimate that the total number of vertebrate species are only about 60,000. The total number of vertebrate varies because scientists do not always agree that similar vertebrate species are actually unique. This number also changes because animal species become extinct.

Vertebrate Facts


Mammal Facts


  • Mammals are a diverse group of animals. Their size, shape, and where they live varies widely.

  • There are over 4000 different types of mammals.

  • Mammals are a warm-blooded animal.

  • Since mammals are helpless when they are born, most mother and sometimes father mammals take care of their babies.

  • It is natural for all mammals drink their mother's milk.

  • All mammals have hair, including the whales, manatees and other mammals that live in the ocean.

  • Except for the anteater, all mammals have teeth.

  • Except for the spiny anteater and the duckbilled platypus, all mammals are born live. The spiny anteater and the duckbilled platypus are born from eggs.

  • See more Mammal Facts.

Reptile Facts


  • There are about 6500 different reptile species. Nearly half of the reptile species are different kinds of snakes.

  • Reptiles are cold-blooded animals.

  • Reptiles must breathe air. They cannot live underwater. Reptiles that spend their time in the water must come to the surface for air.

  • All reptiles have dry scaly skin.

  • Most reptiles, except some species of lizards, are born from eggs.

  • See more Reptile Facts.

Amphibian Facts


  • Amphibians are unique because when they are young, they live in the water and breath through gills like fish. As amphibians grow, they develop lungs and then breath air like mammals, reptiles and birds.

  • Amphibians live in water when they are young, but can live on land once they develop lungs.

  • Even though amphibians can live on land as they develop, they must keep their skin moist, so they typically live near water or wet ground.

  • Amphibians are cold-blooded.

  • Types of amphibians include frogs, toads, newts, salamanders and caecilians.

  • See more Amphibian Facts.

types of animals - mammals

Tigers are mammals that are found living in Southern Asia (China, Russia, India and Korea).

animal facts - reptiles

The saltwater crocodile, which is a reptile, is known as having the most powerful bite of any animal.

Animal facts - amphibian facts

The red-eyed tree frog, which is found in Central America, southern North America and northern South America, is one type of amphibian.

Animal facts - fish

Scientists have identified over 15,000 species of fish in the world, but they expect to find many more. A new type of fish is currently being found about every other day.

Fish Facts


Bird Facts


Invertebrate Facts


More Facts about Animals

Facts About Mammals

- Mammal Facts -

Facts about Mammals

Facts About Mammals: Learn all about mammals.

Facts about Whales

- Mammal Facts -

Facts about Whales

Facts about Whales: Learn all about whales including the blue whale, orca whale, humpback whale and more.

Reptile Facts

- Reptile Facts -

Facts about Dolphins

- Mammal Facts -

Penguin Facts

- Bird Facts -

Facts about Amphibians

- Amphibian Facts -

Facts about Sharks

- Fish Facts -

Facts about Sea Turtles

- Reptile Facts -

Seahorse Facts

- Fish Facts -

Facts about Birds

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Facts about Rays

- Fish Facts -

Wolf Facts

- Mammal Facts -

Funny Animal Facts

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Facts about Snakes

- Reptile Facts -
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